NFA B639
Carrying NFA B639 over BRANCH
IN THE CITY OF GALLATIN, Sumner, Tennessee
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
NFA B639 in Sumner, Tennessee sits above 10% of rated Tennessee bridges on inventory load rating (22 t), while its 1990 build year is earlier than 24% of Sumner's recorded-year cohort (398 bridges).
NFA B639 in Sumner, Tennessee is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1990, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure TN:830B6390001
LATE-CENTURY · CONCRETE · MULTI-SPAN · CULVERT-LED · LOCAL-ADT · STANDARD-LOAD · CAT-GOOD
- LATE-CENTURY 1980–1999
- CONCRETE Concrete
- MULTI-SPAN 3 spans
- CULVERT-LED Culvert-led
- LOCAL-ADT Local ADT
- STANDARD-LOAD Standard load
- CAT-GOOD Good
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: NFA B639
The NFA B639 bridge in Sumner, Tennessee carries NFA B639 over BRANCH. It was built in 1990, making it 36 years old today. The structure is built primarily of concrete continuous and spans 3 sections, stretching 12.8 meters (42 feet) end to end. Daily traffic averages 630 vehicles, placing it in the lower-traffic tier of Tennessee bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show culvert at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How NFA B639 compares
Age against the county: built in 1990, earlier than 94 of Sumner's 398 bridges with a recorded construction year (24%), against a county median build year of 1982. This is one of the newer structures in its county.
Live comparison across Tennessee bridges with a recorded inventory load rating (20,355 of 20,379 rated).
NFA B639 vs every rated Tennessee bridge
Inventory load rating (metric tons), FHWA NBI, this state
22 Top 90% higher than 10% of 20,355 bridges
rated Tennessee bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Sumner inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 398 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1990
- Material
- Concrete Continuous
- Number of Spans
- 3
- Structure Length
- 12.8 m (42 ft)
- Deck Width
- 11.0 m (36 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 630 vehicles/day
- Structure Number
- 830B6390001
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether NFA B639 is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare NFA B639 against other structures in Sumner and across Tennessee. Tennessee bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for NFA B639?
NFA B639 in Sumner, Tennessee on the FHWA's 0–9 scale.
How often is NFA B639 inspected?
NFA B639's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 630 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. NFA B639 is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for NFA B639?
NFA B639 has an NBI inventory load rating of 22.4 metric tons.
Who is responsible for maintaining NFA B639?
NFA B639 is owned and maintained by City/Municipal Highway Agency.
How old is NFA B639 and does age affect safety?
NFA B639 was built in 1990, making it 36 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.